Eine neuartige Fragmentierung bicyclischer Enoläther Verfahren zur Darstellung macrocyclischer Lactone
作者:J. Becker、G. Ohloff
DOI:10.1002/hlca.19710540854
日期:1971.12.10
Vicinal α-hydroperoxy-tetrahydropyranyl ethers annelated to cyclododecane are smoothly converted by homolytic fission in about 75% yield to a mixture of the macrocyclic lactones 3, 4, and 5. Based on this observation, an economically feasible synthesis of Exaltolide1 (>65% yield) has been developed. The mechanism of this new β-fragmentation reaction is discussed.
稠合到环十二烷邻位α过氧化氢基四氢吡喃基醚平滑地通过均裂在约75%的产率转化为大环内酯类的混合物3,4,和5。基于这一观察,Exaltolide的经济上可行的合成1(> 65已开发出%(收率)。讨论了这种新的β片段化反应的机理。